Dr. Church received her bachelors, master's and medical degrees at Queen's University before completing her residency in anatomic pathology at the same institution. She then moved to Boston to complete her education in both molecular genetic pathology and pediatric pathology at Harvard Medical School. She is currently a Molecular and Pediatric Pathologist at Boston Children's Hospital, where she is a founder and associate medical director of the Laboratory for Molecular Pediatric Pathology (LaMPP). She is an Assistant Professor of Pathology at Harvard Medical School, the Program Director for the Harvard Molecular Genetic Pathology Fellowship, and the Chair of Clinical Practice for the Association for Molecular Pathology.

Dr. Church's clinical and research work focus on bringing molecular testing to the clinical care of children with cancer. Through institutional projects (the Profile study, GAIN consortium study) she has profiled thousands of children's tumors and has used these results to make real-time impacts on their diagnoses and treatments. She is involved in national initiatives to improve the quality and access to molecular testing for children with cancer, including the NCI-funded Count Me In Study (Dana Farber, Broad Institute), the National Comprehensive Cancer Network, National Institutes of Health, and the Children's Oncology Group. She was recently awarded the American Association for Cancer Research and St. Baldricks Foundation Award for Outstanding Achievement in Pediatric Cancer Research.